Graphite and graphene as perfect spin filters

Based upon the observations (i) that their in-plane lattice constants match almost perfectly and (ii) that their electronic structures overlap in reciprocal space for one spin direction only, we predict perfect spin filtering for interfaces between graphite and (111) fcc or (0001) hcp Ni or Co. The...

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Veröffentlicht in:	arXiv.org 2007-08
Hauptverfasser:	Karpan, V M, Giovannetti, G, Khomyakov, P A, Talanana, M, Starikov, A A, Zwierzycki, M, van den Brink, J, Brocks, G, Kelly, P J
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemical bonds Copper Filtration Graphene Graphical user interface Graphite Lattice parameters Nickel Organic chemistry Physics - Materials Science Transition metals
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creator	Karpan, V M Giovannetti, G Khomyakov, P A Talanana, M Starikov, A A Zwierzycki, M van den Brink, J Brocks, G Kelly, P J
description	Based upon the observations (i) that their in-plane lattice constants match almost perfectly and (ii) that their electronic structures overlap in reciprocal space for one spin direction only, we predict perfect spin filtering for interfaces between graphite and (111) fcc or (0001) hcp Ni or Co. The spin filtering is quite insensitive to roughness and disorder. The formation of a chemical bond between graphite and the open $d$-shell transition metals that might complicate or even prevent spin injection into a single graphene sheet can be simply prevented by dusting Ni or Co with one or a few monolayers of Cu while still preserving the ideal spin injection property.
doi_str_mv	10.48550/arxiv.0708.1735
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subjects	Chemical bonds Copper Filtration Graphene Graphical user interface Graphite Lattice parameters Nickel Organic chemistry Physics - Materials Science Transition metals
title	Graphite and graphene as perfect spin filters
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